[FFmpeg-cvslog] avcodec/error_resilience: Use a symmetric check for skipping MV estimation
Michael Niedermayer
git at videolan.org
Mon Feb 25 19:04:46 EET 2019
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Tue Feb 19 18:41:42 2019 +0100| [e4289cb253e29e4d62dc46759eb1a45d8f6d82df] | committer: Michael Niedermayer
avcodec/error_resilience: Use a symmetric check for skipping MV estimation
This speeds up the testcase by a factor of 4
Fixes: Timeout
Fixes: 13100/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMV2_fuzzer-5767533905313792
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e4289cb253e29e4d62dc46759eb1a45d8f6d82df
---
libavcodec/error_resilience.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/error_resilience.c b/libavcodec/error_resilience.c
index 1abae53f41..35d0c609e5 100644
--- a/libavcodec/error_resilience.c
+++ b/libavcodec/error_resilience.c
@@ -437,7 +437,7 @@ static void guess_mv(ERContext *s)
}
if ((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) ||
- num_avail <= mb_width / 2) {
+ num_avail <= FFMAX(mb_width, mb_height) / 2) {
for (mb_y = 0; mb_y < mb_height; mb_y++) {
for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
const int mb_xy = mb_x + mb_y * s->mb_stride;
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